EP0356146A3 - Magnet assembly - Google Patents

Magnet assembly Download PDF

Info

Publication number
EP0356146A3
EP0356146A3 EP89308355A EP89308355A EP0356146A3 EP 0356146 A3 EP0356146 A3 EP 0356146A3 EP 89308355 A EP89308355 A EP 89308355A EP 89308355 A EP89308355 A EP 89308355A EP 0356146 A3 EP0356146 A3 EP 0356146A3
Authority
EP
European Patent Office
Prior art keywords
magnetic
frame
magnet assembly
submarine
moment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89308355A
Other languages
German (de)
French (fr)
Other versions
EP0356146A2 (en
Inventor
Terence Warren Nichols
Peter Harry Maddocks
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Marconi Co Ltd filed Critical Marconi Co Ltd
Publication of EP0356146A2 publication Critical patent/EP0356146A2/en
Publication of EP0356146A3 publication Critical patent/EP0356146A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G9/00—Other offensive or defensive arrangements on vessels against submarines, torpedoes, or mines
    • B63G9/06—Other offensive or defensive arrangements on vessels against submarines, torpedoes, or mines for degaussing vessels

Abstract

A magnet assembly comprises a rigid non-magnetic frame (10) which can be located around a vessel such as a submarine. Embedded in the frame (10) is a plurality of magnetic elements (12), suitably variable magnetic moment magnets. A plurality of magnetic sensors (13) is mounted rigidly on the frame (10) but spaced from it, and control means are provided for controlling the magnetisation state of the variable moment of magnets according to the magnetic field detected by the magnetic sensors. The magnetic signature of the submarine can thereby be reduced to a minimum.
EP89308355A 1988-08-19 1989-08-17 Magnet assembly Withdrawn EP0356146A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8819779 1988-08-19
GB8819779A GB2222026B (en) 1988-08-19 1988-08-19 Magnet assembly

Publications (2)

Publication Number Publication Date
EP0356146A2 EP0356146A2 (en) 1990-02-28
EP0356146A3 true EP0356146A3 (en) 1990-07-04

Family

ID=10642429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89308355A Withdrawn EP0356146A3 (en) 1988-08-19 1989-08-17 Magnet assembly

Country Status (7)

Country Link
EP (1) EP0356146A3 (en)
JP (1) JPH02114088A (en)
AU (1) AU3999089A (en)
DK (1) DK405689A (en)
FI (1) FI893896A (en)
GB (1) GB2222026B (en)
NO (1) NO893308L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU684814B2 (en) * 1994-10-05 1998-01-08 Boeing North American, Inc. Magnetic handling and cable wrapping system
FR2902194B1 (en) * 2006-06-09 2008-08-08 France Etat DEVICE AND ASSOCIATED METHODS FOR MEASURING THE MAGNETIC SIGNATURE OF A BOAT
GB2443265B (en) * 2006-10-27 2009-12-16 Ultra Electronics Ltd Magnetic signature assessment
DE102018131564B4 (en) * 2018-12-10 2024-02-08 Stl Systems Ag Degaussing and signature measurement system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1303801A (en) * 1965-07-28 1973-01-24
EP0024307A1 (en) * 1979-07-24 1981-03-04 Licentia Patent-Verwaltungs-GmbH Device for compensating the magnetic field of disturbance of an object by means of a magnetic self-protection arrangement
EP0130767A1 (en) * 1983-07-04 1985-01-09 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Improvements in or relating to magnetic assemblies
EP0217712A1 (en) * 1985-09-27 1987-04-08 Thomson-Csf Demagnetizing device, particularly for ships

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1303801A (en) * 1965-07-28 1973-01-24
EP0024307A1 (en) * 1979-07-24 1981-03-04 Licentia Patent-Verwaltungs-GmbH Device for compensating the magnetic field of disturbance of an object by means of a magnetic self-protection arrangement
EP0130767A1 (en) * 1983-07-04 1985-01-09 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Improvements in or relating to magnetic assemblies
EP0217712A1 (en) * 1985-09-27 1987-04-08 Thomson-Csf Demagnetizing device, particularly for ships

Also Published As

Publication number Publication date
GB2222026A (en) 1990-02-21
FI893896A0 (en) 1989-08-18
JPH02114088A (en) 1990-04-26
FI893896A (en) 1990-02-20
GB2222026B (en) 1991-09-25
EP0356146A2 (en) 1990-02-28
DK405689D0 (en) 1989-08-17
DK405689A (en) 1990-02-20
NO893308D0 (en) 1989-08-17
GB8819779D0 (en) 1989-03-30
AU3999089A (en) 1990-02-22
NO893308L (en) 1990-02-20

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